# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 2)
2.
If h is the difference in level between end points separated by l, then the slope correction is . The second term may be neglected if the value of h in a 20 m distance is less than
m
1 m
2 m
3 m
Explanation:
No answer description is available. Let's discuss.
Discussion:
67 comments Page 1 of 7.

NARDOS TEFERI said:   1 year ago
For slope (M) up to 20%.
According to me, the solution is;

Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
(9)

Chaan A said:   2 years ago
Explain it clearly.
(5)

Second term will be neglected when h=3cm not 3meter for length 20 meter.
(3)

Mukesh das said:   3 years ago
How it will be 3m?

Please explain clearly with the completed formula.
(3)

Mukesh das said:   3 years ago
How it will be 3m?

Please explain clearly with the completed formula.
(4)

Dev Narayan Yadav said:   3 years ago
l = 20 m.
H2 = 2l,
H2 = 2*20,
H2 = 40.
And;
H = 6.32 or 6.33,
√40 = 6.32.
(5)

Khagendra said:   4 years ago
For slope (M) up to 20%.
Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
Here the nearest one is 3m.
So 3m is the appropriate answer.
(14)

Kartabo Ketema said:   4 years ago
How it will be 3m? Explain it with the formula.

Nandhu said:   4 years ago
The second term can be negleted only if the slopes flatter than 1 in 25..
That means 4%.

i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.
So option A is right.
(4)

Fayez abusafaqa ps said:   4 years ago
The error can be accepted upto 10%. thus, the second term divided by the correlational factor equal 0.1.

Assuming the first term is x and the second term is y. Then y/x+y=0.1==> x+y/x=10 with y not zero==>1+x/y=9==>y=9. solve it u will get l=3.